.index {
  overflow: hidden;
  position: relative;
  height: 100%;
  background: url('../assets/red_bg_02.jpg') center no-repeat;
  background-size: cover;
}
.shandian {
  width: 100%;
  margin-top: 20%;
}
.game_title,
.big_bone {
  display: block;
  margin: 0 auto;
}
.game_title {
  width: 70%;
  padding-top: 12%;
}
.big_bone {
  width: 80%;
  margin-top: -12%;
}
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 26%;
  z-index: 9999;
}
.footer .left {
  float: left;
  width: 55%;
}
.footer .right {
  float: right;
  width: 45%;
  margin-top: -20%;
}
.lion_dance {
  width: 90%;
}
.prize_btn,
.start_game_btn,
.game_rules_btn {
  float: right;
  width: 80%;
}